The contract
HoldsNative coin and ERC-20 tokens
Admin, pause, upgradeNone
FeeNone
Tests27 unit and fuzz tests, full path on a local chain
AuditNot yet. Do not use real funds before it.
Open source
B4Floor · The Cold Vault
The Cold Vault
Wealth you leave behind should not sit with a stranger. A Cold Vault is a smart contract you deploy for yourself. Cold Library never holds it, cannot open it and takes nothing from it. The contract only follows the plan you wrote.
How it works
You decide. The contract follows.
Set the plan
Heirs and their shares, up to twenty. Keepers who can confirm you are gone silent, and how many must agree. How long the silence, how long the veto window. Optionally a date, like a time capsule.
Live as usual
Deposit, withdraw, change the plan, any time. Every action counts as a check-in and cancels anything pending.
If you go silent
After the silence period, your keepers confirm. A veto window follows: you can cancel by checking in, and each keeper can stop it once.
Heirs claim
Each heir claims their own share with their own wallet. Assets that arrive later are split the same way. Nobody else can claim, whatever they know.
With an exhibit or a plaque
The trial tells them how. Only their wallet can claim.
Link a vault to your exhibit or plaque. When an heir passes your warden's trial, the recognised layer shows them the vault, the chain, their share and plain instructions. Guessing the answers gains nothing: the contract pays only the wallets you registered.
The vault desk
Use it with your own wallet.
Testnet only until the audit. Every action is signed in your wallet; this page never sees your keys.
My vaults
A vault I keep or inherit from
Status: the contracts are tested and live on the Sepolia testnet (factory 0x70C3…0cA3, source verified), but not audited and not on mainnet. Crypto-asset services are restricted or prohibited in some places, including mainland China; the vault is not offered where it is not lawful. A vault is not a legal will.